In the evening/morning following Wikimania, I talked with over 50 Wikimedians, and took the liberty of jotting down their single favorite session. I would like to share with you the four presentations/discussions they thought you should definitely watch back on video. A more complete tally is available on this page at wikimaniawiki with some more recommendations. The four most mentioned sessions were:

Maryana Pinchuk & Steven Walling, "Creative ways to alienate women online: a how-to guide for Wikipedians" (7 votes): "Diversity I" video not yet available.
Ralph Koster, "Wikipedia is a Game" (6 votes): Featured speakers V on livestream
Tobias Lutzi, "Which law applies to Wikipedia" (4 votes): Free Culture II on youtube
Dimitar Dimitrov (panel discussion), "Liquid lobbying - how could Wikimedia change EU copyright" (3 votes): "Free Culture VI" video not yet available.

All 'featured track' speakers are available on http://new.livestream.com/wikimania/ , for other speakers you will have to look at youtube and be lucky. I hope the organizers will be able to give these most popular sessions some priority while uploading videos, and can add the missing links.

Looking forward to watching some of them myself,

Best,

Lodewijk